chore: enforce race detector (#2122)

Previously, there were some data races in syft. Right now, none are
detected, so check for data races on the overall command, and on unit
tests. (Checking for races on integration tests triples the time needed
for those tests, from ~1 minute to ~3 minutes on my workstation, so that
was not done at this time.)

Signed-off-by: Will Murphy <[email protected]>

Makefile

@@ -147,13 +147,14 @@ check-json-schema-drift:
 .PHONY: unit
 unit: $(TEMP_DIR) fixtures  ## Run unit tests (with coverage)
 	$(call title,Running unit tests)
-	go test -coverprofile $(TEMP_DIR)/unit-coverage-details.txt $(shell go list ./... | grep -v anchore/syft/test)
+	go test -race -coverprofile $(TEMP_DIR)/unit-coverage-details.txt $(shell go list ./... | grep -v anchore/syft/test)
 	@.github/scripts/coverage.py $(COVERAGE_THRESHOLD) $(TEMP_DIR)/unit-coverage-details.txt
 
 .PHONY: integration
 integration:  ## Run integration tests
 	$(call title,Running integration tests)
 	go test -v ./test/integration
+	go run -race cmd/syft/main.go alpine:latest
 
 .PHONY: validate-cyclonedx-schema
 validate-cyclonedx-schema: